$match and $process-message in MELD

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Rachelle Oseni

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Jan 9, 2026, 1:31:14 PM (10 days ago) Jan 9

to InterOp.Community & Meld

Hi everyone,

I wasn't able to reach the MELD helpdesk, hopefully someone can assist me here!

I’m looking for clarification on support for the $match and $process-message operations in the MELD Sandbox.

For $match, my understanding is that it is not supported, since it is not a standard FHIR RESTful API operation, and that similar functionality can be achieved using standard FHIR search query parameters. Can anyone confirm if this is correct or share recommended approaches?

For $process-message, does MELD support this type of FHIR messaging bundle and operation? I am doing testing on an IG that relies on this messaging pattern and would like to understand whether it can be tested and/or supported in the MELD environment.